Testes mass in the livebearing fish Brachyrhaphis rhabdophora (Poeciliidae) varies hypoallometrically with body size but not between predation environments
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DOI: 10.1002/ece3.4618
Abstract: Abstract In this study, we considered potential causes of variation in testis size in the livebearing fish Brachyrhaphis rhabdophora. We evaluated variation in testes mass among individual males and among populations that occupy different selective… read more here.
Keywords: livebearing fish; size; fish brachyrhaphis; testes mass ... See more keywords
Pre- and postcopulatory competition affect testes mass and organization differently in two monophyletic mole-rat species, Georychus capensis and Fukomys damarensis
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DOI: 10.1093/jmammal/gyad021
Abstract: Sperm competition results from postcopulatory continuation of male–male competition for paternity. The level of sperm competition is predicted to be highest in species with greater polyandry and weakest in monogamous pairs. Sperm competition levels can… read more here.
Keywords: pre postcopulatory; sperm competition; competition; testes mass ... See more keywords